Heney allendee and alexander t



(No Model.)

H. ALLENDER & A. T. HENDERSON.

LABORATORY BURNER. V

PatentedOct. 12, 1886.

In Yen law.-

UNITED STATES PATENT ti Fries.

HENRY ALLENDEE AND ALEXANDER T. HENDERSON, OF DETROIT, MICHI- GAN,ASSIGNORS TO THE COMBINATION GAS MACHINE COMPANY, OF

SAME PLACE.

LABORATORY-BURNER.

SPECIFICATION forming part of Letters Patent No. 350,796,'dated October12, 1886.

Application filed January 1-1, 1886. Serial No. 183,518. (X model.)

To all whom it may concern.

Be it known that we, HENRY ALLENDER and ALEXANDER T. HnNDERsoX, ofDetroit, in the county of 'Wayne and State of Michigan,

5 have invented new and useful Improvements in Laboratory-Burners; andwe hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,which form a part of this specification.

This invention relates to certain new and useful improvements in theconstruction of laboratory-burners, which are especially designed forlaboratories using gasoline gas or r 5 machine gas, which day by dayvaries so much in quality, such variation being caused by changes oftemperature, by radical differences in the gravity of the gasolineemployed, and other causes.

The construction of this device is such that the air and gas suppliedcan be regulated so as readily to give any size and color of flamedesired, and to furnish the necessary amount of air to produce thedesired combustion entirely above the jet and between it and themixingtube.

The invention consists in the peculiar con struction of the variousparts and their combinations, as more fully hereinafter described.

3 Figurel is an elevation in perspective of our improved burner. Fig. 2is a vertical central section of the same.

In the accompanying drawings, A represents a stand or base cast integralwith the stud B, which centrally located with relation to the base,these two parts being preferably cast together in iron or other suitablemetal and solid. After this casting is made a vertical central bore ismade through the base and stud, which is iuteriorly threaded near theupper end of the stud, as shown in Fig. 2,while asection ofpiping,O, istapped into the side of the stud to afford means for the entrance of gasinto the interior thereof. A

5 plug, D, carrying a needle-valve, E, is then inserted in the lower endof the bore in the base A, and secured therein in any suitable way, sothat the point of the needle is vertical to the exact center of thebore.

F is a jet-tube, the lower end of which is shoulder a, there is securedin an annular re- 5 cess, b, the necessary packing to prevent the escapeof gas. The upper end of the jet-tube is conical in form, as shown,witha centrally, located small aperture for the escape of gas, and theseparts are so constructed and arranged that if the jet is screwed homeuntil the shoulderis in contactwith the upper end of the stud B thepoint of the needle-valve will entirely close the gas-escaping orificein the jet-tube. It will readily be seen that by this construction, sofar as described, the How of the gas is regulated by the fixedneedle-point and the vertical adjustment of the jet-tube.

Two circular arms, G, are cast upon opposite sides of the jet-tube, andintegral there- 0 with, and with the collar I-I,whichlattcr isinternally threaded to engage with the threaded end of the mixingtube I,and so arranged that the axial center of such tubeI is in vertical linewith the point of the needle-valve and gas-escaping orifice in the jet.By this construction all the oxygen necessary to produce combustion ofthe gas is supplied to the gas at the mouth of the jet-tube, and betweenit and the lower end of themixing-tube I, so that the verticaladjustability of the latter by the means described will furnish thenecessary and adjusted amount of air to produce the desired coloredflame at the upper end of this tube ll. 8 5

The amount of gas required [or various kinds of laboratory work isobtained by the vertical adjustability of the jet-tube, thereby changingthe relative position of the opening therein to that of theneedle-valve, the latter o ofwhich is fixed. XVhile the necessary amountof air to produce the required flame is obtained by the adjustability ofthe mixing-tube I, and while this device has been described as moreespecially designed for utilizing the gas which is the product of thevarious machines in use, it will be found equally serviceable where gasis employed which is produced by destructive distillation.

It will be observed that the mixing-tube I is so constructed that, ifnecessary, it may be lowered to such an extent as to cover the jettube Fand completely out off the supply of air to the flame, and to this weattach impor- 5 tance.

What we claim as our invention is- 1. The combination, with the baseprovided with stationary needle-valve, of the jet tube F,verticallyadjustable on said base, and pro- 10 vided with conical aperturecontrolled by said valve, the arms G and threaded collar H, formedintegral with said tube, and the mixing-tube I,vertically adjustable insaid collar, and constructed to close the upper end of the 15 jet-tubewhen desired, substantially as and for the purpose specified.

HENRY ALLEN DER. ALEXANDER T. HENDERSON.

\Vit-nesses:

NORMAN BELL, J AMES H. MASON.

